Bump org.testcontainers:postgresql from 1.17.6 to 1.18.3 (#201)

Bumps [org.testcontainers:postgresql](https://github.com/testcontainers/testcontainers-java) from 1.17.6 to 1.18.3.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.18.3)

---
updated-dependencies:
- dependency-name: org.testcontainers:postgresql
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -13,7 +13,7 @@ kotest-arrow = "1.3.3"
 klogging = "4.0.0-beta-29"
 uuid = "0.0.20"
 postgresql = "42.6.0"
-testcontainers = "1.17.6"
+testcontainers = "1.18.3"
 hikari = "5.0.1"
 dokka = "1.8.20"
 logback = "1.4.8"